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Showing 1 to 15 of 15 for “"Pin Fin"”.
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Flow Boiling in Meso-Scale Pin-Fin Coldplates
… Recent flow boiling studies have focused on fin-enhanced silicon microgaps and microchannels, given their importance in cooling high-power-density chips operating at ultra-high heat fluxes. However, the majority of the research on flow boiling in mini- and macro-scale configurations has been …
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Investigation of Pin Fin Cooling Channels for Applications in Gas Turbines
… at temperatures beyond material limitations. Pin fin channels are commonly used on the trailing edge of the blades, where they enhance heat transfer and also provide structural support. This study focuses on the validation of several commercially available RANS turbulence models in CFD, that …
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Aerodynamic Force and Pressure Loss Measurements on Low Aspect Ratio Pin Fin Arrays
… The use of internal cooling channels fitted with pin fin arrays serves as one method of accomplishing this goal. Consequently, the addition of pin fin arrays comes at the expense of increased pressure drop. Therefore the pin fin geometry must be judiciously chosen to achieve the required heat …
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Investigation of Erosion and Deposition of Sand Particles within a Pin Fin Array
… within both a fully developed and developing pin fin arrays is explored using computational fluid dynamics (CFD) simulations. The simulations are carried out using the LES solver, GenIDLEST, for the fluid (carrier) phase and a Langragian approach for the particle (dispersed) phase. A grid …
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Manufacturing and analysis of a LIGA heat exchanger for the surface of a tube: a cooling simulation of the leading edge region of a turbine blade
… of a flat configuration parallel plate micro pin fin heat exchanger are described. The pin fin array geometry investigated is staggered, with pin diameters of 500 ¦Ìm, height to diameter ratios of 1.0 and spacing to diameter ratios of 2.5. Pressure loss and heat transfer experimental results …
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Heat Transfer Coefficient and Adiabatic Effectiveness Measurements for an Internal Turbine Vane Cooling Feature
… microcircuit passages are filled with irregular pin fin features that serve to increase convective cooling through the channels. Results from this study indicate a strong interaction between the internal microcircuit features and the external film-cooling from the slot exit. Asymmetric cooling …
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Development of a Methodology to Measure Aerodynamic Forces on Pin Fins in Channel Flow
… promise in both of these industries. Although pin fins are often placed in the cooling channels to augment heat transfer, their addition comes at the expense of increased pressure drop. Consequently, the pin fin geometry must be judiciously chosen to achieve the desired heat transfer rate while …
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A piezoelectric translational flow agitator for active air cooling of electronics.
… a piezoelectric translational agitator and micro pin fin arrays on the heat sink surfaces is considered. The piezoelectric translational agitator generates high frequency and large displacement motion to a blade. It is driven by an oval loop shell that amplifies the small displacement of the piezo …
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A Detailed Uncertainty Analysis of Heat Transfer Experiments Using Temperature Sensitive Paint
… after extended use. A rib turbulated rig and a pin fin rig were used to conduct this research. It was found that the electrical current used to calculate the heat transfer coefficient is the major contributing parameter in the uncertainty. The increase in surface temperature reduced the …
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Heat Transfer from Low Aspect Ratio Pin Fins
… gas turbines is limited by thermal management. Pin fins are commonly used to augment heat transfer by increasing surface area and increasing turbulence. The present research is focused on but not limited to internal cooling of turbine airfoils using pin fins. Although the pin fins are not …
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Heat Transfer from Multiple Row Arrays of Low Aspect Ratio Pin Fins
… heat transfer characteristics through arrays of pin fins were studied for the further development of internal cooling methods for turbine airfoils. Low aspect ratio pin fin arrays were tested through a range of Reynolds numbers between 5000 and 30,000 to determine the effects of pin spacing as …
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Analysis of Stresses in Metal Sheathed Thermocouples in High-Temperature, Hypersonic Flows
… solving a highly generalized version of the 1-D pin fin equation, allowing for the solution of the temperature distribution in a sensor taking into account conduction, convection, and radiation heat transfer which is not possible with other existing analytical solutions. This temperature …
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Thermal Management with Supercritical Carbon Dioxide under Extreme Applications
… including microchannel forced convection, jet impingement, porous media, nanofluids, pin fin arrays, and film cooling, each offering distinct advantages and limitations. While the performance of single- or two-phase cooling systems are generally predictable, in extreme thermal environments, new …
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Experimental Investigation Of The Effect Of Turbulence On Slot-Fed Film Cooling Adiabatic Effectiveness And Downstream Heat Transfer
… </p> <p> For this project, a unique pin fin array was developed and integrated in the two cylindrical leading edge test sections. The test sections were designed, fabricated, and instrumented to be able to acquire temperature measurements and pressure measurements at different …
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Optimization and Fabrication of Heat Exchangers for High-Density Power Control Unit Applications
… study the various cooling options based on jet impingement, mini-channel, ribbed mini-channel, phase change material and double sided cooling configurations for application in hybrid electric vehicle and other similar consumer products and perform parametric and optimization study on selected …